Furnace



A. SMALLWOOD.

FURNACE. APPLICATION FILED JULY al', 1918.

Patented Sept. 7, 1920.

SHEETS-SHEET l.

A.. SMALLWOOD.

FURNACE. APPLICATION FILED JULY 31,1918.

Patented Sept 7, 1920.

5 SHEETS-SHEET 2.

A. SMALLWOOD. FURNACE.

l N FILED 1,35 1,801. Patentedsept. 7, 1920.

5 SSSSSSSSS EET 3.

A. SMALLWOOD.

FURNACE. APPLICATION FILED JULY 31, I9I8.

Patented Sept. 7, 1920.

5 SHEETS-SHEET 5.

' UNITED STATES P'rsNT creme.

ALFRED SMALLWOOD, OF LONDON, ENGLAND.

FUR/NACE.

Application filed. hay 31,

To @ZZ/111750.11@ t may concern.'

lle it known that l, AitLrnnD Si. Linwoom subject olf the King of Great Britain, residing' at l2 lalarg'rave Fari Highgate, London, N., in the county ot' Middlesex, England, metallurgist, have vinvented lmprovei ments in or Relating` to Furnaces, of which the Vfollowing is a'speciiication.

This invention comprises certain improvements in or relating to turna-ces. and refers particularly to turna adapted to be heated by gaseous, vaporeus, or liquid fuel.

iiceording to the present invention, air 'for combustion is adapted to be admitted te he fuel at a point removed from the point of primary ignition. Air Jfor the primary ignition may be admitted toY a 1Bunsen ni'ner7 and the mixture may be'iired at the mouth of the burner in a chamber. The sec'- ondary air may be admitted to the mixture' after it has substantially t laversed this chamber.

t feature of the present invention reside in the lact that a secondary air system such this is pl ralized in conjunction withl a si .'gzle tir-:nace or heating;- chamber. Advantageously such secondary air system is employed in conjunction with each Bunsen binnen'although two or more burners may i lesired be combined with each secondary systen. By the employment, however, series of substantially separate tems., each havingits burner vor burners and secondary air supplye a particularly effective .grading and distribution of the heat may be obtained.

The systems may be arranged in pairs located in opposed formation so that one of vh pair is adapted to supply heat to each side or end of the same goods chamber.

in order that this invention may be clearly understood and readily carried into 'prac- 'ie. reference may be had to the appended explanatory sheets of drawings7 upon which:

Figure lis a sectional end elevation of a `furnace according; to the present invention. the plane of section being` on line 1 2 or' Fig. 2.

2 is a sectional plan of the furnace shown in Fig. l, the plane of section being on line 3-4 of Fig. l and line 5-6 of Fig. 3.

Fig. 3 is a sectional end elevation ol the furnace shown in Figs. l and 2, the plane ot' section being' on line 7-8 oi' the ligure last mentioned.

Speciieaton of Letters Patent.

Patented Sept. 7., 11520.

1918. Serial No. 247,645.

Fig. el is a sectional plan on line 9-10 of Fig. l. n

Fig. 5 is a sectional elevation on line lil- 12 or" Figs. l and 4L, and

6 is a sectional Velevation onv line ifini 0f Fig. 1.

ln a convenient embodiment of the present invention, there are provided below the floor of a heating` chamber e, a series ot, say, six or eight isolated or substantially isolated chambers Y). These may be in alined pairs located transversely at intervals along` the furnace. Two vertical partitions c are located longitudinally in each chamber. These partitions are adapted to 'term a centralchamber or flue and two fines Z one on each side ot said central chamber or tine, these side nues being in communication with the central chamber or flue at the extremity hereotremote from the side of the tur.- ace. llilith the extremity et the central chaml'ier adjacent to the side oi the 'furnace a sen burner is placed in communicatie l way of a port e with which a primary air inlet el may communicate. At their extremities near to the side of the furnace the side lines (Z communicate with the heating chamber c or jacket spaceor the like tor heating;` the same, 'for which purpose said fines (Z adjoin each other at to enter spaces S and communicate by a common port f/ with the goods cl amber c.. To permit of this the port c may communicate with the lower part of the central chamber and the side fines Z may extend to positions one on each side of the port c; the connecting passage f between the side tlues Z may be located above the port c.4

It desired, connecting` lues may be provided between the inner extremities of chambers occurring` on opposite sides ot the 'tun nace, which chambers may appertain to different pairs.

Below each chamber a horizontal air i'lue 71, is provided. This air flue 7L extends inwardly of the 'furnace substantially the length oiC the chamber Y) and communicates by upwa rd ports with the central chamber Z. and with the two side lues d at the ends ot said chamber and side flues remote from the outer wall ot the furnace. The 'fuel is thus enabled to be partially lired in the cen- `tlues below the chambers the air is heated in said tlues by heat radiated downwardly. Alternatively or additionally, however, the

. air in the secondary air supply tlues may be iok heated by the wastefurnace gases, for which purpose the latter' may be passed through tliies arranged in the vicinity of said air lifie's. To permit ofthis, tlues for the waste gases are carried downwardly to the vicinity orn the air lines so that the air flues may be located in such a position that it is unneces- .sary to draw the air downwardly into the goods chamber in a manner necessitating the latter being under closed conditions.

One embodiment of the former of the two alternatives last mentioned is illustrated in the drawings, in which the heating` gases are adapted to egress from the goods chamber a by tworports j located one on each side oii the goods chamber a at one extremity thereof. 'l These ports j extend inwardly and vcommunicate at 7c with two longitudinal flues located between the systems (Z and the air iliies lft. After having traversed the length of the iurnace in the tliies Z, the-gases Y are adapted to pass by way of connecting ports m into i'iues fn, in which latter the gases f again traverse the length. ot the i'fiirnace.

The gases then pass by'way of connecting ports o into two longitudinal tliies p which ,Y

extend the length of the 'furnace and adjoin a vertical flue Q by which they are conveyed to the stack.

i' represents a small heating gas outlet located at the end of the goods chamber remote from that at which the outlets y' are provided.

satisfactorily' distributed within the goods chamber. 1n thecase ot long furnaces, or

in anyrcase where desired, additional outlet ports may be provided at the side or sides ot' the goods chamberor in the roei' thereof,

these outlets being in communication with tion the stack, as for instance by way of a longitudinal jacket flue in the crown through iliie Q may pass gaseous or liquid fuel, including in comlii-` nation with a goods chamber, means for introducing air for primary combustion, andY means independent ot said first named means Y for introducing tor secondary combusat a point removed from the pointkot' vprimary combustion.

gaseous or liquid fuel, y goods chamber, a plurality ot isolated cham- 2. VIn afurn'ace adapted to be heated by in combination a j bers beneath saidl goods chamber, each of :at the otherl extremity, horizontal air 'i rlhis outlet i communicates with the tlue y, and enables the heat to be more said isolated chambers provided with two vertical partitions adapted to form a central passage and two tliies, said dues being in communication with the central passage at one extremity and with the goods chamber at the other extremity.

3. 1n a furnace adapted to be heated by gaseous or liquid fuel, in combination a goods chamber, a plurality oit isolated charn- .bers beneath said goods chamber, each of said isolated chambers provided with two verticalpartitions adapted to form a central passages and two ilues, said tliies being iii communication with the central passage at one extremity and with the goods chamber at the other extremity, and horizontal air luesadapted to permit ingress of air to the lines at the extremity at which ,they corimiinicate with the central passage.

4i. Inl aV furnace,V in combination with a goods chamber, a plurality of isolated chambers beneath said goodschamber, each oi" said isolated chainoers provided with t vertical partitions adapted to form a centr passage and two lines, said lines being in communication with the centralpassage at one extremity and with the goods chamber n adapted to permit ingress or air to the ltlues at the extremity at which they communicate with the central passage, longitudinal ilu-es -V located between the air admission iues and theisolated chambers, and communiranting` with one endet said goods chamber to ne vide a path 'for the waste furnace gases;

5. in a furnace, in combination with a goods chamber, a plurality.oia isolated chambers beneath said goods chamber, cach o' said isolated chambers provii'led with vertical partitions adapted toiorin a central passage and two ducs, said Vdues being in communication with the central passage at one extremity and with the goods chamber at the other extremity, horizontal air dues adapted to permit ingress of airto the fines at the extremity at 'which they communicate to the central passage, longitudinal fines arranged Vbetween the air admission lues and the isolated chambers communicating withone end ot said V'goods chamber to provide a path for the wasteV furnace gases, and additional longitudine` vtlues arranged belowthe airy admission iliies and communicating with said i'irst named longitudinal tlues at the end opposite to the one Vcommunicating with the goods chamber.

f EDGAR N. WHEELER -V 

